Creep resistant titanium aluminide alloy
AssigneesHowmet Corporation, Avco Corporation
InventorsDonald E. Larsen, Jr., Prabir R. Bhowal, Howard F. Merrick
Life of this patent
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Abstract
Creep resistant titanium aluminide alloy article consisting essentially of, in atomic %, about 45 to about 48 Al, about 1.0 to about 3.0 Nb, about 0.5 to about 1.5 Mn, about 0.25 to about 0.75 Mo, about 0.25 to about 0.75 W, about 0.15 to about 0.3 Si and the balance titanium. The article has a heat treated microstructure including gamma phase, alpha-two phase and at least one additional particulate phase including, one or more or W, Mo, and Si dispersed as distinct regions in the microstructure.
Claims10
Titanium aluminide alloy composition consisting essentially of, in atomic %, about 44 to about 49 Al, about 0.5 to about 4.0 Nb, about 0.25 to about 3.0 Mn, about 0.1 to less than about 1.0 Mo, about 0.1 to less than about 1.0 W, about 0.1 to about 0.6 Si and the balance titanium.
Titanium aluminide alloy composition consisting essentially of, in atomic %, about 45 to about 48 Al, about 1.0 to about 3.0 Nb, about 0.5 to about 1.5 Mn, about 0.25 to about 0.75 Mo, about 0.25 to about 0.75 W, about 0.15 to about 0.3 Si and the balance titanium.
Titanium aluminide alloy composition consisting essentially of, in atomic %, about 47 Al, 2 Nb, 1 Mn, 0.5 W, 0.5 Mo, 0.2 Si and the balance Ti.
A creep resistant titanium aluminide alloy article consisting essentially of, in atomic %, about 45 to about 48 Al, about 1.0 to about 3.0 Nb, about 0.5 to about 1.5 Mn, about 0.25 to about 0.75 Mo, about 0.25 to about 0.75 W, about 0.15 to about 0.3 Si and the balance titanium, said article having a microstructure including gamma phase and at least one additional phase bearing at least one of W, Mo, and Si dispersed as distinct regions in the microstructure.
A creep resistant gas turbine engine component consisting essentially of, in atomic %, about 45 to about 48 Al, about 1.0 to about 3.0 Nb, about 0.5 to about 1.5 Mn, about 0.25 to about 0.75 Mo, about 0.25 to about 0.75 W, about 0.15 to about 0.3 Si and the balance titanium, said article having a microstructure including gamma phase and at least one additional phase including W, Mo, or Si, or combinations thereof, dispersed as distinct regions in the microstructure.
Dependencies are inferred from the claim text.